Using SVGs in React Native Development with Expo: Step-by-step Guidance!

Using SVGs in React Native Development with Expo: Step-by-step Guidance!
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Why is the image format SVG so popular amongst app developers these days? Well, SVGs come with a wide range of capabilities and have a lot to offer to modern-day mobile & web development projects. Developers can create & edit SVG files effortlessly using any text editor and manipulate the properties using CSS. Besides, you can scale an SVG to any resolution based on your requirements. The resolutions do not affect the size of files owing to the nature of SVGs. As a result, the size of the files is quite small as compared to pixel- based ones. Moreover, an SVG is SEO friendly as its language format is based on XML markup. This enables one to embed descriptions or keywords directly into the image. Furthermore, developers can easily customize, edit, and animate SVG files as per the need.
This post guides you through the right methodology for using SVGs for React Native with Expo. Here, we have selected React Native as it is one of the most widely used technologies for developing mobile & web apps. This write-up will provide you with thorough insights on how to employ SVGs in React Native app development projects.

What are SVGs?

Scalable Vector Graphics, commonly known as SVGs is an image format that allows you to resize and stretch images as per the need without affecting the quality or performance of images. SVGs prove to be an effective way of presenting visual elements like icons.
Employing SVGs on the web is a simple process; developers simply need to copy an SVG and then embed it inline into an HTML file. This method is effective as browsers know how an SVG can be parsed and presented. However, employing SVGs becomes difficult when it comes to mobile apps. This is because Expo doesn’t understand how SVGs can be processed & parsed right away on iOS and Android development environments. Here, you need to use a React Native package and SVG converter to make things work.
Check out how to carry out the whole process starting from SVG creation to implementing it in an Expo project!

Employing SVGs in React Native with Expo: Key Steps to Follow

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Step # 1: Create a React Native Project

For setting up a React Native project, we are going to employ the Expo framework for bootstrapping the React Native app. For this, you must install ‘Node.js/npm.’ For installing expo-cli globally, you need to open a terminal and then, run the code npm install –global expo-cli. Once installed, use the code “expo install react-native-svg-tutorial” for creating a new react-native project. While running this command, you’ll also get an option to choose a template. After this process is completed, you need to navigate to the root of your project directory. Now, start the Expo development server using the code expo start react-native-svg-tutorial and an interactive menu appears.
You can use the Expo dev server for testing your app locally during the development process. And, for running the application, you need either the ‘Expo Go App’ or an emulator.

Step # 2: Create an SVG in React Native

For creating an SVG in React Native, you will have to build a custom loader for the app. Here, you need the library called react-native-svg that supports React Native apps.
To begin with, you need to open a terminal, navigate to the root of the project, and then, install the library using the code expo install react-native-svg. Now, go to the root directory and create a file named Loader.js. At this point, React Native developers need to do some coding and paste the code below this file.
Your SVG image is done! Please note that the aforesaid SVG image creation methodology involves using the components offered by react-native-svg in place of employing HTML elements. While HTML elements use the lower case for ‘naming,’ the components of react-native-svg use the sentence case.
Now, you need render the SVG in the App.js file.

Step # 3: Add an SVG to a React Native App

First of all, you need to create a new Expo app using the command expo init new-expo-app. Then, use the command, cd new-expo-app for moving it into the new folder of the expo app and add the react-native-svg using yarn add react-native-svg. This package provides SVG support to the React Native application.
Now, import the SVG file to the assets folder. Then, create a folder in the root of your project and give it a name. Add a .js file to this folder. Thereafter, import the necessary components for creating a function. For this, you need to create a svgComponent.js file and paste it into svgComponent.js. Now, open the SVG file. Copy the file’s contents and use it for replacing .
Now, it’s time to create a constant in the .js file & paste the SVG contents within a pair of batsticks. Then, generate a function within the .js file and employ the component SvgXml from react-native-svg. At this point, you’ll move the previous constant into xml prop and also can define their width and height. Then, return the function and your .js file is completed.
You can now import the new SVG component into your App.js and use it as required just like a regular React Expo component. Now, run the project and start the simulator by using the command expo start.

When can you consider adding an External SVG to a React Native App?

Now, the probable questions that will arise in your mind are: Is it at all necessary to create an SVG in React Native with Expo? Can’t an external SVG be used in React Native apps?
Well, this decision entirely depends on your project requirement. The key benefit of making an SVG in React Native with Expo is that this SVG component can be customized as per your need. You can also add animations and props to the SVG. However, all app development projects do not require image customization or animation. In such scenarios, you can simply add an external SVG image into your React Native app without customizing it.

There are two methods that are used for adding external SVG images to RN apps.

There are two methods that are used for adding external SVG images to RN apps.
The first one is the SvgUri component offered by the react-native-svg library. With react-native-svg-uri, you will be able to render external SVG images from a static file or a URL. However, this library involves a limitation when used in Android devices – file loading in the release mode becomes a problem. The SVGs are visible during the app development, testing, and debugging mode. But, as soon as the Android app is uploaded to the play store, the SVGs stop being rendered on Android devices. To resolve this issue, you need to use the svgXmlData prop along with the SvgUri component.
You can also employ another library named react-native-svg-transformer for importing external SVG files into React Native development projects.

Step # 4: Animate an SVG created in React Native

Here’s how to animate an SVG created in React Native with Expo. To achieve this outcome you need to modify the SVG component’s stroke color every few milliseconds. Create a file named AnimatedLoader.js and do some coding. Here, we are using React Native’s animated API for creating animations.
With the help of the code const AnimatedPath=Animated.createAnimatedComponent(Path), make the component ‘Path’ animable. Then, create an Animated.Value that you can attach with an animated component. Now, store the Animated.Value using a useRef hook so that you don’t have to mutate it directly. The benefit of creating the animation in the useEffect hook is that this loop enables developers to produce the fade-in & fade-out effects.
Now, hook up the animation you created with the component AnimatedPath. Attach the color Animated.Value with the AnimatedPath prop called ‘stroke.’ This will interpolate the color Animated.Value to create a color mapping between the outputRange and the inputRange. Thereafter, you need to save & reload the emulator for viewing the modifications.

Ending Note:

I hope this post has helped you to gain a thorough understanding of how to employ SVGs in React Native with Expo. However, for successfully creating & using SVGs in React native apps, you must rope in experience developers who can code efficiently without any glitches. So, if you are a novice or lack the necessary technical resources, you may seek assistance from adept React Native app development services for the best results.

Free Web Hosting Services for React and Angular Apps: Noteworthy Offerings!

Free Web Hosting Services for React and Angular Apps: Noteworthy Offerings!
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You’ve created an outstanding web app or website? Sounds great! However, your job is not over yet, unless you are able to pick a suitable web hosting service for deploying your app/website. Your targeted audience will be able to view your website or application only if it is hosted on the World Wide Web.
A web hosting service deploys a website or an app on a computer network so that an internet user or a web browser client can access it. A web host or a web server refers to a computer system that deploys a web app. Web hosts permit customers to embed multimedia files or documents like web pages or HTML pages into a specialized computer called the web server. The web server offers continuous support and a high-speed connection. Internet users can view your website by typing website or domain address.
Web hosting services are a necessity! However, it’s difficult to find a suitable web hosting platform that offers free services. This post explores the free web hosting services for deploying React apps and Angular apps. I have chosen React and Angular as these are the most preferred frameworks for developing responsive websites or apps speedily and cost-effectively.

Free Web Hosting Services for React and Angular Apps & their Offerings



Heroku is one of the viable options for hosting Angular apps and React apps. This popular Cloud service platform supports a wide range of frameworks and its free plan is sufficient for most projects. The free plan provides 550 dyno hours. The limit gets extpended to 1000 dyno hours if users verify themselves by furnishing their credit card particulars. This step is just for user verification, no amount is charged. Users can work on five projects for free.

Heroku: Key Features

Heroku is a container-based setup and is easy to use. It offers a simple solution for web application development & web page hosting. The platform even allows you to add customized domains and offers various tools that allow you to scale your app as per business requirements. You can deploy the custom domains with the help of Docker and Git. Another noteworthy feature of Heroku is its CLI which makes it possible to deploy projects straightaway from the code editor. Moreover, the services offered by Heroku are synchronized and secure, providing a rich user experience altogether.

Heroku: Limitations and Resolutions

One limitation of Heroku’s free plan is that the servers go into sleep mode if no activity is detected for 30 minutes. In other words, the app “sleeps” if there aren’t any visitors for 30 minutes at a stretch. But, what happens when the app gets visitors after going off to “sleep mode?” Well, then Heroku runs the application again employing commands such as ‘npm build.’ Yet, there’s another bottleneck you’ll face. Your app will take longer to load and you are likely to lose any app instance that you have stored. The app instance can be any kind of data that has been stored in the form of a variable. Nevertheless, there is a solution to this problem as well. You can prevent your Heroku app from going into “sleep mode” by using “cron-jobs.” This command will carry out the task of automatically pinging the app every thirty minutes.

Heroku: Usage Guidance

Check out how to go about the process of app deployment using Heroku. After developing the app, users have to create a new GitHub repository and or sync it to their existing repository. Then they need to add the code to it. After users create their account and connect it to Heroku, the platform pulls the code. Users then deploy the website/web app by clicking the option “Deploy Branch” available under the category of “Manual Deploy.” Heroku deploys the app after the build process finishes and delivers the completed project to the users immediately.

Google’s Firebase

Google-developed Firebase is a managed hosting service that caters to static content, dynamic content, and microservices. This hosting service includes Cloud Build and provides ready-made solutions designed for DevOps that automate your project’s workflow and facilitate continuous deployment.
The free hosting service of Firebase, known as the ‘Spark Billing Plan’, offers 10GB storage; but, users can transfer only 360MB of data in a day. Firebase offerings include SSL certification, the support for custom domains, and the allowance for hosting several sites for each project.
If your Firebase project avails of the ‘Spark Billing Plan,’ and you connect the project with a Cloud billing account, Firebase automatically upgrades your project to the billing model called “Blaze.” “Blaze” refers to the pay-as-you-go model.

Firebase: Key Features

The key features include hosting, analytics, Cloud Firestore, phone authentication, Cloud in-app messaging, dynamic links, global CDN, SSD storage, the availability of a real-time database, etc.

Firebase: Limitations and Resolutions

Firebase allows users unrestricted access to Google’s services and benefits React and Angular app developers to a great extent. But, if your project requires the involvement of any third-party service like MongoDB endpoints, you have to go for the paid services.

Firebase: Usage Guidance

First of all, you need to install the Firebase CLI globally and log in with either your Firebase or Google account. Then go to the root directory of the project and run the command firebase init. Reply yes when asked for confirmation to proceed. After setting up the project, you will have to host the project. Hosting involves steps like uploading hosting assets using Firebase deploy. Finally, you’ll have to run the command of firebase deploy.

GitHub Pages

This popular hosting service is an excellent option for newbies as it enables speedy website deployment. It’s a great option for hosting static websites. You can also deploy a multi file website using this platform.

GitHub Pages: Key Features

GitHub Pages comes with benefits like easy maintenance and features such as automated deployments, CI/CD configuration, etc.

GitHub Pages: Usage Guidance

This platform directly transfers JavaScript, CSS, and HTML files from a GitHub repository. The files are then optionally run using a build process and the website or web app gets published. Here’s how to go about the process.
Create a free GitHub account and upload the code into a public repository over there. Then, rename the file for indexing the index.html file and inserting relevant HTML content. Now, scroll down and execute the new modifications. GitHub Pages host your website at once; it takes around one to ten minutes. Your website gets live under your specific username and domain name.


Vercel is a transformative serverless web hosting service that caters to several JavaScript-based apps including React and Angular apps. This platform allows one to effortlessly ” import projects” from Bitbucket and GitLab.

Vercel: Key Features

Vercel comes with the “fast refresh” feature that enables live editing for the UI components. Its “flexible data fetching” functionality works for every dev environment, once you connect your pages to an API, or a data source, or a headless CMS.

Vercel: Usage Guidance

For deploying Vercel, you need to create a new account and login using OAuth. Once the login process is a success, you can view a dashboard. This dashboard or the Vercel CLI can be used for project deployment.
Here’s an example of how to deploy a React app using the Vercel CLI and dashboard.
Vercel CLI: Install Vercel globally and run the command Vercellogin. Then you’ll get an option asking you to enter the email that is registered with Vercel. After successful submission, you’ll receive a login verification email from Vercel. Now, go to the root directory of your project and run the command vercel. Then you’ll be asked questions related to aspects like specifying the project path, project deployment scope, project’s name, the location of the directory that contains the code, etc. Once these questions are answered, the project will be ready to deploy.
Vercel Dashboard: The first step of app deployment using the dashboard involves integrating Bitbucket, GitLab, or GitHub to the place the React app is stored. Then click on the option ” Import Project” available on your panel. Thereafter, you need to import your project. Vercel auto-detects and picks a well-suited configuration for your project. Then click on deploy and your job is done.


This highly productive web development tool helps developers to architect, test, and deploy websites and web apps including Angular & React Apps. The free web hosting services offer multiple serverless solutions and instant rollback plans to users. It offers three plans that cater to individual hosting, team plans, and business hosting requirements.

Netlify: Key Features

Owing to the various plugins offered by Netlify like form plugins, authentication plugins, etc.; one doesn’t need to manage any database for maintaining the users’ data on the server. With “Netlify Functions”, one can write as well as run Lambda functions.

Netlify: Limitations and Resolutions

Netlify is designed for static sites and so, doesn’t cater to Node.js applications. So, if you have written the app code in Node.js, you’ll have to rewrite the code in React or Angular.

Netlify: Usage Guidance

Once users create an account with Netlify, the projects can be directly integrated with the users’ git account.

Amazon EC2

Amazon EC2 is another service that is suitable for deploying a React/Angular website or app. Amazon EC2 is not entirely free service. The web hosting services are offered for free for a twelve-month period. However, if utilized properly, one can make the most out of these 12 months.

Amazon EC2: Key Features

Amazon EC2 users can access several Amazon services like Amazon Dynamo DB, a real-time database (250 GB), etc.

Amazon EC2: Limitations and Resolutions

The usage of web hosting services is limited to 750 hours for each user.

Amazon EC2: Usage Guidance

You need to select AWS EC2; then you can choose the processor RAM. You have the flexibility to choose processors from options like T2 micro, T2 small, and T2 mini.

Microsoft’s Azure

Microsoft’s Azure web hosting services support multiple platforms including Linux and Windows.

Azure: Key Features

You get a high-end virtual private server for your React app or Angular app. The pay-as-you-go model is also available.

Azure: Limitations

Azure provides a free trial period that lasts for 12 months with limited amount of services each month. Besides the quantity of services available in a month expires at the end of the month.

End Note:

I hope the aforesaid details about the novel offerings and limitations of the free web hosting services available for deploying React apps and Angular apps have proved beneficial for you.
If you are a newcomer and require professional assistance with web app development, deployment, or maintenance, I would suggest you to partner with an experienced software development service provider. Experienced Angular App development companies and React Native development services can help you to create and deploy an app following the best practices and intelligent strategies. This will help your business create its digital footprints globally.